1000kV输电线路耐张塔带电作业电位转移电流脉冲波形特征参数研究  

Characteristic Parameters of Pulse Waveform of Potential Transfer Current for Live Working on Tension Tower of 1000kV Transmission Line

作　　者：吴田 付道睿 彭勇 黎鹏 刘凯 方春华[1] WU Tian;FU Daorui;PENG Yong;LI Peng;LIU Kai;FANG Chunhua(College of Electrical Engineering&New Energy,China Three Gorges University,Yichang 443002,Hubei Province,China;China Electric Power Research Institute,Wuhan 430072,Hubei Province,China)

机构地区：[1]三峡大学电气与新能源学院,湖北省宜昌市443002 [2]中国电力科学研究院有限公司,湖北省武汉市430072

出　　处：《电网技术》2022年第5期2009-2016,共8页Power System Technology

基　　金：国家自然科学基金(51807110)。

摘　　要：进入等电位是特高压输电线路带电作业关键步骤,而电位转移电流脉冲波形特征参数是确定其等值电路、电弧能量和电磁干扰特性基础。该文以1000kV交流输电线路电位转移电流实测数据为样本,通过波形参数提取算法统计特征量,分析衰减振荡脉冲波形参数大小及分布规律,采用极大似然法估算特征分布方程参数,结合电磁分析软件和特征参数,计算电位转移弱阻尼二阶回路元件参数。结果表明:放电脉冲幅值主要分布在[-300,300]A,概率密度服从广义极值分布;其振荡主频分布在[1.11,25]MHz频段,上升时间均值为0.0204μs,易产生较强电磁脉冲干扰;波形衰减常数区间在[0.004,0.989]。运用电位转移等效回路元件参数所仿真波形与实际波形较吻合。研究结果可为电位转移脉冲的特征参数选取及能量计算提供依据和方法。Entering the equal-potential is a key step of live working on UHV transmission lines,while the characteristic parameters of the pulse waveform of the potential transfer current are the basis for the determination of its equivalent circuit,arc energy and electromagnetic interference characteristics.Taking the measured data of the potential transfer current of 1000 kV AC transmission line as a sample,this paper extracts the statistical characteristic quantities of the algorithm through the waveform parameters and analyzes the size and distribution of the attenuated oscillation pulse waveform parameters.By using the maximum likelihood method the characteristic distribution equation parameters are estimated.Combining the electromagnetic analysis software and the characteristic parameters the parameters of the weakly damped second-order loop components of the potential transfer are calculated.The results show:the amplitudes of the discharge pulse are mainly distributed in[-300,300]A,and the probability density obeys the distribution of Generalized Extream Value;the main frequencies of its oscillation are distributed in the frequency band range of[1.11,25]MHz,and the average rise time is 0.0204μs,which is easy to produce strong electromagnetic pulse interference;the waveform attenuation constant interval is in[0.004,0.989].The simulated waveforms produced by the potential transfer equivalent circuit element parameters is mostly consistent with the actual waveforms.The research results will provide a basis and method for the selection of characteristic parameters of the potential transfer pulse and energy calculation.

关 键 词：1000kV 输电线路 电位转移 放电脉冲 特征参数 

分 类 号：TM721[电气工程—电力系统及自动化]